Correct option is A
The correct answer is (A) three to seven.
El Niño is a complex weather system that occurs roughly every three to seven years. It is a warming of the tropical Pacific that can cause drought, floods, and other weather extremes.
Explanation
- El Niño is a warming of the tropical Pacific Ocean that occurs when trade winds weaken and warm water moves eastward.
- It's linked to the Southern Oscillation, which is a change in atmospheric pressure between the Australian–East Asian region and the eastern tropical Pacific.
- El Niño can impact weather in many places, including India, where it can lead to below-normal rainfall and droughts.
- The name El Niño is Spanish for "the child" and refers to the baby Christ, as the current usually appears around Christmas.
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